Fan or blower



E. L. GARFIELD. FAN ORBLJOWER. "APPLICATION FILED MAR. 22; $20.

Patented 111116714, 1921.

INVENfO/i? llllllllllllllllllllllll A TTQHNEYS UNITED STATES P TENT OFFICE.

EDWARD L. GARFIELD, or 'rnoxnnon, New YORK.

FAN OR BLOWER.

To allwhom it may concern:

Be it known that I, EDYVARD L. GARFIELD, a citizen of the United States, and aresident of Tuckahoe, in the county of lVestchester and State of New York, have invented a new and Improved Fan or Blower, of which the following is a description.

: My invention relates to a fan or blower and more particularly is designed for embodiment in a ventilating fan.

The general object of my invention is to provide a fan or blower improved in var ous particulars with a view to promote facility in the making and assembling of the structural elements entering into the fan and its frame; as well as to promote convenience in the installation of the fan in a ventilating system for example, and to provide a fan having durability and made up of a few and simple parts.

The invention resides in the novel construction of the fan and the bracing means for the blades thereof as well as in the novel arrangement of the fan casing and its frame, looking to the attainment of strength in the frame and theproper housing and guarding of the blades and the fan hub; a further important object being to provide a frame construction of a character to insure that the adjustable bearings for the fan shaft will be maintained in alinement and distorting strains set up in the fan when in operation be resisted.

Reference is tobe had to the accompanying drawings forming a part of this specification, it being understood that the drawings are merely illustrative ofone example of the invention.

Figure. 1 is a front elevation of a fan embodying my invention;

Fig. 2 is a transversesection taken through the fan as indicated by the line 2-2 Fig. 1;

Fig. 3 is a fragmentary face view showing a portion of the. fanwith the fan hub and one of the blades, and the hub disk to which the blades are secured and bracing means for the blade;

Fig. 4.- is an enlarged cross section through one of the blades asindicated by the line 44, Fig. 3. I

In carrying .out my invention in accordance with the illustrated example the hub 10 of the, fan is mounted on the fan shaft 12 asby a set screw 11. Said shaft turns in any approved ball bearings, the casings of which are indicated by the numeral 13. The

v Specification of Lettersl atent. Patented Application filed March 22, 1920. Serial No. 367,945.

June 14,1921.

numeral 14 indicates bearing mounts forming part of, spiders 15 at each side of the fan and supporting the casings 13 through the medium of adjusting and centering screws 16. The bearing mount ltof each spider presents arms 14 deflected laterally inward and 1 p forming part of the same conicalj surface, said arms being suitably securedas by bolts 15 or the like to the spiderarms 15. ,j The arms of the respectivespiders 15 are'out- Wardly divergent relatively to each other while the spiders are deflected bodily toward each other and toward the medial plane of the fan to thus give the frame a truss form. The outer ends of the spider arms are fastened to a frame 17 here shown as a rec- 1 tangular frame, made up of angle bars, the connecting means being corner pieces 18 provided on said frame and serving to stiffen the same, to which corner pieces the outer ends of the arms are secured by bolts or.

rivets 15". The cornerpieces 18 are here indicated as secured by bolts-19 to the angle bars of the-frame l7 and said bolts also secure a web 20 provided within said frame in a plane approximately medial of the fan structure, said web carrying a cylindrical casing 21 within which the fan revolves. The casing 21 is made rigid by any suitable means with the web .20, therebeing shown a ring 22 of angle iron, the fianges of which are respectively fastened to said web and casing. The frame including the spiders 15 with the bearing mounts 1% as. described serves to rigidly sustain the bearing casings 13 in alinement and the result is attained by l a construction involving few parts of extreme simplicity. In order to produce a fan of light construction and having adequate strength anc durability in accordance with my invention, said fan is made up as follows: The blades 23 are secured at their inner ends by bolts 25 or the like to a disk open to accommodate the shaft 12, said disk being here shown as separate and of sheet metal S8- cured by bolts 26 to the hub flange} The disk 24: it will be observed, has the relation to the hub 10 of a flange thereon-for the securing of the blades.

Each blade 23 is strengthened by a brace 27 at the inner end of the blade and extending to any desireddistance toward the outer end of the blade. It will be observed that the brace 27 is at the back of the blade 23 between the same and the hub disk 24. For securing the blade and the brace said blade along a side edge 23 is disposed at an angle to the general plane of the blade and in a plane parallel with the plane of the hub disk 24. Similarly, the brace 27 at that side edge 27 adjacent to the edge 23 of the blade is disposed at an angle to the general plane of the brace, parallelwith the edge 23 and disk 24 and lying fiatagainst the latter.-

'27 has a width greater than that of the similar edge or flanged portion 23 of blade 23, and the juncture of the flange 27 and brace 27 is on a line laterally beyond the juncture of the flange 23' with the blade 28, so that the body of the brace 27 is in a plane at an angle to that of the body of the blade 23, thereby producing a convergent interventing space 30. The arrangement is such that the brace of itself and without the employment of adventitious spacing means, serves to give the proper spaced relation and relative angularity of the blade and its brace. Said brace fiange,it will be seen, is directly applied to the hub disk and flatwise against it withthe blade flange imposed fiatwise directly on the brace flange, the result being an exceedingly strong construction, yet involving the mlnimum simplicity and making for the facility'with which the parts may be assembled.

I I would state in conclusion that while the illustrated example constitutes a practical embodimentof my invention, I do not limit myself strictly to the mechanical details herein illustrated, since manifestly the same can be considerably varied without departure from the spirit of the invention as del'fined in the appended claims.

Having thus described my invention, I claim:

1. 'A fan including blades, a separate hub having a blade carrying portion and braces for said blades, each blade having an edge portion thereof at an angle to the body of the blade, the brace of said blade having an edge portion at an angle to the body of the brace, said edge portions being in planes parallel with the said blade-carrying portion of the hub and being secured to the latter, the body of the blade and the body of the brace lying in planes at an angle to each other.

2. A fan including blades, a separate hub having a blade-carrying portion, and braces for said blades, each blade having an edge portion thereof at an angle to the body of the blade, and the brace of said blade having an edge portion at an angle to the body of the brace, said edge portions being in planes parallel with the blade-carrying portion of the hub and being secured to the latter,the

brace lying directly against said blade-carrying portion "betweenthe same and the blade and the whole being secured" together, the angular edge portion'of the brace having'a greater width than the angular edge portion of the blade to extend beyond the latter so that the bodyof the brace is at an angle to the body of the blade.

3. A fan or blower including blades, a hub rigid therewith,'a shaft on which the hub is secured, a fixed casing about said blades, a frame outside of said casing, a web in the plane of the fan and secured respect vely to said casing and to said frame,

spiders at the sides of the casing, the arms of the respective spiders being outwardly di- 'vergent, means securing the spiders rigid with the frame and web, bearing mounts carried by said spiders, and bearings for said shaftwithin said bearing mounts.

4:. A fan or blower including a frame, a fan casing within said frame, means connecting the fan casing with the frame, spider arms divergent toward "their outer ends, means rigidly connecting the outer ends of the spiders with the frame and the first-mentioned means, alined bearing mounts rigid with the respective spiders, bearings in said mounts, a shaft turning in said bearings, fan blades within said casing and means mounting said blades and arranged to turn with said shaft. v V

5. In a fan, a frame, spiders at opposite sides of the frame, alined bearings supported in said spiders, a shaft turning in said bearings, fan blades, means mounting said fan blades to turn with the shaft, a casing within said frame outside of said blades, a

web disposed in the plane of the fan within shaft turning in said bearings, fan blades, means mounting said blades to turn with said shaft, a casing for said fan blades within said frame, and means securing said casin tosaid'frame said mean'sbein secured to said spiders and corner pieces.

' EDWARD L. GARFIELD. 

